Hello I am made a cannon that I converted to a piston valve rifle and I need to unscrew a steel 1.25 inch endcap that I sealed leaks on I used gorrila glue as the sealent. Also will I be able to spray paint it black? The solder job isn't too good.

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note the 1.25 inch endcap needs to be replaced as the rifle will lose some looks. ;)

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Heat is your friend, get a blowtorch and get that puppy real hot, it will render the glue useless and you will be able to unscrew it easy like.

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If you can't get enough leverage with pipe wrenches (unlikely, as an 18" wrench with a few feet of pipe attached has enough leverage to tighten 2" steel fittings until they break), heat will be the way to go. Were they just glued and hand tightened, or did you use a pipe wrench to tighten them after you glued them?

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Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.

the neat thing about gorilla glue is that it expands, filling almost every nook and crany. the thinnest layer possible can expand to over a 1/4" if the moisture content is wrong or zero moisture. this is why carpenters like it. it fills in the cracks and is stainable. you should have read the directions.

your typical propane blowtorch is not going to heat the steel up enough to disturb the bonds.

Well guess what I just got the endcap off and replaced it I guess I didn't need to build a new chamber And the reason I used gorrila glue is because it exspands so it would seal and there were a few leaks even with a ton of teflon.

How much did you tighten it with the teflon? For that size of fittings you should have used about 6' of tape per joint, braced it against the floor with a pipe wrench, and tightened it with an 18" pipe wrench until you couldn't turn it anymore. If you did that, the fittings shouldn't have leaked unless they were defective.

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Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.